linux-kernel - Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size() and early_acpi_os_unmap

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Date:   Sun, 8 Jan 2017 02:45:44 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Lv Zheng <lv.zheng@...el.com>,
        Bob Moore <robert.moore@...el.com>,
        Jörg Rödel <joro@...tes.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>
Subject: Re: 174cc7187e6f ACPICA: Tables: Back port acpi_get_table_with_size()
 and early_acpi_os_unmap_memory() from Linux kernel

On Sun, Jan 8, 2017 at 2:01 AM, Borislav Petkov <bp@...en8.de> wrote:
> On Sun, Jan 08, 2017 at 01:52:50AM +0100, Rafael J. Wysocki wrote:
>> So we get the table, but apparently we crash when we attempt to put it.
>
> Right, except on 4.10-rc2 we don't crash but we freeze early. These are
> the last lines:
>
> ...
> [    0.004778] mce: CPU supports 7 MCE banks
> [    0.004861] LVT offset 1 assigned for vector 0xf9
> [    0.004945] Last level iTLB entries: 4KB 512, 2MB 1024, 4MB 512
> [    0.005025] Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 512, 1GB 0
> [    0.005165] Freeing SMP alternatives memory: 24K
> [    0.211154] ftrace: allocating 25022 entries in 98 pages
> [    0.219614] smpboot: Max logical packages: 2
> <EOF>
>
>> Let's try to check the obvious just to rule it out (see attached), but
>> honestly I'm not sure what's going on in there.
>
> No change, same freeze.

I was afraid that that would be the case.

Can you try to comment out the acpi_put_table() in
early_amd_iommu_init() and see if that makes any difference?

Thanks,
Rafael